{"product_id":"touptek-gs-papo-guide-scopes","title":"Touptek GS PAPO Guide Scopes","description":"\u003ch1\u003eTouptek GS Serie PAPO Guide Scopes\u003c\/h1\u003e\n\u003cp\u003eThe GS Series guide scopes feature a proprietary three-element PAPO (planar apochromatic with integrated field flattener) optical configuration, incorporating a single ED element to achieve effective chromatic correction. The internal barrel is precision-machined with anti-reflection threads to suppress stray light, while all lenses are coated with multi-layer broadband AR coatings. This greatly enhances image contrast and resolution, ensuring pinpoint star images for accurate, efficient guiding, thus improving the stability of primary telescope imaging.\u003c\/p\u003e\n\u003cp\u003eDesigned around a 1-inch flat, well-corrected image circle, the GS Series supports sensors up to the IMX533 size. Versatile in function, it can be used for star-hopping, guiding, visual observing, and even DSO imaging—making it an ideal tool for astrophotography, casual stargazing, and entry-level night-sky photography.\u003c\/p\u003e\n\u003cp\u003e\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0652\/6245\/2965\/files\/S1_22e0b587-54c1-4c63-9c45-117ce8259581.webp?v=1763663120\u0026amp;width=700\" alt=\"\"\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cimg alt=\"\" src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0652\/6245\/2965\/files\/S2_8289f398-9e9f-41f7-a4f7-9d8ada5bf3f7.webp?v=1763663264\u0026amp;width=700\"\u003e\u003c\/p\u003e\n\u003ch4\u003ePAPO Apochromatic Optical Design for True Star Color Reproduction\u003c\/h4\u003e\n\u003cp\u003eThe GS Series guide scopes feature a proprietary 1-inch corrected image circle, three-element PAPO (Planar Apochromatic with integrated field flattener) optical design, incorporating an ED glass element to effectively correct chromatic aberration, astigmatism, and field curvature. This design delivers high resolution and crisp, pinpoint star images. The outstanding optical performance makes the GS Series equally suited for guiding, visual observing, and entry-level astrophotography.\u003c\/p\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003ch4\u003eSpot diagram of GS-150\u003c\/h4\u003e\n\u003cp\u003e\u003cimg alt=\"\" src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0652\/6245\/2965\/files\/SP1.webp?v=1763663357\u0026amp;width=700\"\u003e\u003c\/p\u003e\n\u003ch4\u003eSpot diagram of GS-200\u003c\/h4\u003e\n\u003cp\u003e\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0652\/6245\/2965\/files\/SP2.webp?v=1763663391\u0026amp;width=700\" alt=\"\"\u003e\u003c\/p\u003e\n\u003ch4\u003eSpot diagram of GS-250\u003c\/h4\u003e\n\u003cp\u003e\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0652\/6245\/2965\/files\/SP3.webp?v=1763663422\u0026amp;width=700\" alt=\"\"\u003e\u003c\/p\u003e\n\u003ch4\u003eSpot diagram of GS-300\u003c\/h4\u003e\n\u003cp\u003e\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0652\/6245\/2965\/files\/SP4.webp?v=1763663441\u0026amp;width=700\" alt=\"\"\u003e\u003c\/p\u003e\n\u003ch4\u003eSpot diagram of GS-350\u003c\/h4\u003e\n\u003cp\u003e\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0652\/6245\/2965\/files\/SP5.webp?v=1763663460\u0026amp;width=700\" alt=\"\"\u003e\u003c\/p\u003e\n\u003ch4\u003e\n\u003cspan\u003e2\u003c\/span\u003eHigh-Transmission Coatings \u0026amp; Anti-Reflection Threads\u003c\/h4\u003e\n\u003cp\u003eAll optical surfaces are treated with broadband multi-layer AR coatings to reduce reflections and maximize light transmission. The internal barrel is precision-machined with anti-reflection threads, complemented by additional stray-light suppression measures, greatly enhancing image contrast and clarity.\u003c\/p\u003e\n\u003cp\u003e\u003cimg alt=\"\" src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0652\/6245\/2965\/files\/S3_0f72a349-df62-47d1-833b-73a6fb981f3f.webp?v=1763663571\u0026amp;width=700\"\u003e\u003c\/p\u003e\n\u003ch4\u003eCNC Precision Machining with Fine Matte Finish\u003c\/h4\u003e\n\u003cp\u003eThe optical tube, mounting rings, and dovetail plate are crafted from aluminum alloy via CNC machining, balancing lightweight design with structural strength. Anodized surfaces provide wear and corrosion resistance suitable for field astronomy. The fine matte finish offers a comfortable, non-slip, and durable tactile experience.\u003c\/p\u003e\n\u003cp\u003e\u003cimg alt=\"\" src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0652\/6245\/2965\/files\/S4_19d8a330-2374-4b4d-8d25-114b3fba8ffd.jpg?v=1763664044\u0026amp;width=700\"\u003e\u003c\/p\u003e\n\u003ch4\u003eModular Structure for Maximum Flexibility\u003c\/h4\u003e\n\u003cp\u003eThe main barrel integrates a proprietary universal M48 extension tube with built-in anti-reflection coating, enabling flexible configuration to meet different optical path requirements. This modular design supports both visual observation and astrophotography applications.\u003c\/p\u003e\n\u003cp\u003e\u003cimg alt=\"\" src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0652\/6245\/2965\/files\/S5_fadcd104-2e71-4962-a4d4-491571a9c655.webp?v=1763664077\u0026amp;width=700\"\u003e\u003c\/p\u003e\n\u003ch4\u003eDual Focusing Options for Flexibility\u003c\/h4\u003e\n\u003cdiv\u003e\n\u003cdiv\u003e\n\u003ch4\u003eAC Version - Rackless Focuser\u003c\/h4\u003e\n\u003cp\u003eSmooth manual focus with Crayford-style precision; stable optical alignment; ideal for light-load astrophotography.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv\u003e\n\u003ch4\u003eAR Version - Rack-and-Pinion Focuser\u003c\/h4\u003e\n\u003cp\u003eHigh-precision focusing with gear-and-rack drive; compatible with ToupTek Astro AAF electronic focuser; supports heavier loads and automated operation.\u003c\/p\u003e\n\u003cp\u003e\u003cimg alt=\"\" src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0652\/6245\/2965\/files\/S6_06d18859-f665-490c-bbf7-01fb066efabf.webp?v=1763664113\u0026amp;width=700\"\u003e\u003c\/p\u003e\n\u003ch2\u003eWide Compatibility Provides Seamless Integration\u003cspan\u003e\u003c\/span\u003e\n\u003c\/h2\u003e\n\u003cdiv\u003e\n\u003cdiv\u003e\n\u003cp\u003e\u003cspan\u003e✓\u003c\/span\u003e\u003cspan\u003e \u003c\/span\u003eSupports guide and planetary cameras with sensor sizes up to 1\".\u003c\/p\u003e\n\u003cp\u003e\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0652\/6245\/2965\/files\/S7_b9e13664-7c93-46ee-9400-be10c2be225d.webp?v=1763664211\u0026amp;width=700\" alt=\"\"\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003e✓\u003c\/span\u003e\u003cspan\u003e Focuser end with 1.25\" inner diameter and external M42×0.75 thread for direct connection to mainstream cooled cameras (recommended sensor size ≤ 1\").\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003e\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0652\/6245\/2965\/files\/S8_a9266538-e7f6-481b-a45c-c8e9231c830a.webp?v=1763664243\u0026amp;width=700\" alt=\"\"\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003e✓ Multiple M5 threaded holes on the top and sides of the clamp for attaching additional astronomical accessories.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003e\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0652\/6245\/2965\/files\/S9_79f3cd33-f588-487a-b1d4-858aa6bf05b8.webp?v=1763664268\u0026amp;width=700\" alt=\"\"\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003e✓ Dovetail plate with multiple M6 threaded holes and one 3\/8\"-16 thread on the bottom for quick mounting to tripods or equatorial mounts.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003e\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0652\/6245\/2965\/files\/S10_f361a185-a00d-4a68-af5f-eb4f29ba6c9f.webp?v=1763664288\u0026amp;width=700\" alt=\"\"\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003e✓ Universal M48 extension tube assembly with replaceable short tube for use with eyepieces or diagonals.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003e\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0652\/6245\/2965\/files\/S11.webp?v=1763664306\u0026amp;width=700\" alt=\"\"\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003ch3\u003eTechnical Specifications\u003c\/h3\u003e\n\u003ch2\u003eFully Upgraded from the FS Series\u003cspan\u003e\u003c\/span\u003e\n\u003c\/h2\u003e\n\u003cp\u003eCompared with the previous FS series, the GS series guide scopes bring major improvements in optical design and performance:\u003c\/p\u003e\n\u003ctable\u003e\n\u003cthead\u003e\n\u003ctr\u003e\n\u003cth\u003e\u003cstrong\u003eCategory\u003c\/strong\u003e\u003c\/th\u003e\n\u003cth\u003e\u003cstrong\u003eFS-250AC \/ AR\u003c\/strong\u003e\u003c\/th\u003e\n\u003cth\u003e\u003cstrong\u003eGS-150AC \/ AR\u003c\/strong\u003e\u003c\/th\u003e\n\u003cth\u003e\u003cstrong\u003eGS-200AC \/ AR\u003c\/strong\u003e\u003c\/th\u003e\n\u003cth\u003e\u003cstrong\u003eGS-250AC \/ AR\u003c\/strong\u003e\u003c\/th\u003e\n\u003cth\u003e\u003cstrong\u003eGS-300AC \/ AR\u003c\/strong\u003e\u003c\/th\u003e\n\u003cth\u003e\u003cstrong\u003eGS-350AC \/ AR\u003c\/strong\u003e\u003c\/th\u003e\n\u003c\/tr\u003e\n\u003c\/thead\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eOptical Design\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eAchromatic Doublet\u003c\/td\u003e\n\u003ctd\u003ePAPO Triplet with Integrated Field Flattener\u003c\/td\u003e\n\u003ctd\u003ePAPO Triplet with Integrated Field Flattener\u003c\/td\u003e\n\u003ctd\u003ePAPO Triplet with Integrated Field Flattener\u003c\/td\u003e\n\u003ctd\u003ePAPO Triplet with Integrated Field Flattener\u003c\/td\u003e\n\u003ctd\u003ePAPO Triplet with Integrated Field Flattener\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eAperture \/ Focal Length\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e45 mm \/ 250 mm\u003c\/td\u003e\n\u003ctd\u003e30 mm \/ 150 mm\u003c\/td\u003e\n\u003ctd\u003e40 mm \/ 200 mm\u003c\/td\u003e\n\u003ctd\u003e50 mm \/ 250 mm\u003c\/td\u003e\n\u003ctd\u003e50 mm \/ 300 mm\u003c\/td\u003e\n\u003ctd\u003e58 mm \/ 350 mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eFocal Ratio\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003ef\/5.6\u003c\/td\u003e\n\u003ctd\u003ef\/5\u003c\/td\u003e\n\u003ctd\u003ef\/5\u003c\/td\u003e\n\u003ctd\u003ef\/5\u003c\/td\u003e\n\u003ctd\u003ef\/6\u003c\/td\u003e\n\u003ctd\u003ef\/6\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eInterface Size\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e1.25-inch \/ M42×0.75\u003c\/td\u003e\n\u003ctd\u003e1.25-inch \/ M42×0.75\u003c\/td\u003e\n\u003ctd\u003e1.25-inch \/ M42×0.75\u003c\/td\u003e\n\u003ctd\u003e1.25-inch \/ M42×0.75\u003c\/td\u003e\n\u003ctd\u003e1.25-inch \/ M42×0.75\u003c\/td\u003e\n\u003ctd\u003e1.25-inch \/ M42×0.75\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eOTA Weight\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e0.60 kg\u003c\/td\u003e\n\u003ctd\u003e0.59 kg\u003c\/td\u003e\n\u003ctd\u003e0.68 kg\u003c\/td\u003e\n\u003ctd\u003e0.82 kg\u003c\/td\u003e\n\u003ctd\u003e0.94 kg\u003c\/td\u003e\n\u003ctd\u003e1.21 kg\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eFocuser Type\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eAC: Rackless (FSB-125C)AR: Rack-and-Pinion (FSB-125R)\u003c\/td\u003e\n\u003ctd\u003eAC: Rackless (FSB-125C)AR: Rack-and-Pinion (FSB-125R)\u003c\/td\u003e\n\u003ctd\u003eAC: Rackless (FSB-125C)AR: Rack-and-Pinion (FSB-125R)\u003c\/td\u003e\n\u003ctd\u003eAC: Rackless (FSB-125C)AR: Rack-and-Pinion (FSB-125R)\u003c\/td\u003e\n\u003ctd\u003eAC: Rackless (FSB-125C)AR: Rack-and-Pinion (FSB-125R)\u003c\/td\u003e\n\u003ctd\u003eAC: Rackless (FSB-125C)AR: Rack-and-Pinion (FSB-125R)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003ch3\u003eIn the Box\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003eGS-XXXAC\/AR guide scope (Includes mounting ring\/dovetail plate)\u003c\/li\u003e\n\u003cli\u003eDust cap\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0652\/6245\/2965\/files\/P1.webp?v=1763666510\u0026amp;width=700\" alt=\"\"\u003e\u003c\/p\u003e\n\u003ch3\u003eWarranty \u0026amp; Manual\u003c\/h3\u003e\n\u003cp\u003e\u003cstrong data-end=\"650\" data-start=\"615\"\u003eToupTek 2 year Warranty \u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003e \u003c\/p\u003e","brand":"Touptek","offers":[{"title":"Crayford Focuser \/ 150mm","offer_id":46492147449953,"sku":"aks1787938073753","price":96.67,"currency_code":"USD","in_stock":true},{"title":"Crayford Focuser \/ 200mm","offer_id":46492147482721,"sku":"ciy1787938073754","price":136.04,"currency_code":"USD","in_stock":true},{"title":"Crayford Focuser \/ 250mm","offer_id":46492147515489,"sku":"mah1787938073755","price":129.04,"currency_code":"USD","in_stock":true},{"title":"Crayford Focuser \/ 300mm","offer_id":46492147548257,"sku":"qdf1787938073756","price":141.51,"currency_code":"USD","in_stock":true},{"title":"Crayford Focuser \/ 350mm","offer_id":46492147581025,"sku":"pti1787938073757","price":175.76,"currency_code":"USD","in_stock":true},{"title":"Rack-and-Pinion Focuser \/ 150mm","offer_id":46492147613793,"sku":"rcc1787938073758","price":110.26,"currency_code":"USD","in_stock":true},{"title":"Rack-and-Pinion Focuser \/ 200mm","offer_id":46492147646561,"sku":"ozr1787938073759","price":119.72,"currency_code":"USD","in_stock":true},{"title":"Rack-and-Pinion Focuser \/ 250mm","offer_id":46492147679329,"sku":"lzk1787938073760","price":155.25,"currency_code":"USD","in_stock":true},{"title":"Rack-and-Pinion Focuser \/ 300mm","offer_id":46492147712097,"sku":"xmn1787938073761","price":160.07,"currency_code":"USD","in_stock":true},{"title":"Rack-and-Pinion Focuser \/ 350mm","offer_id":46492147744865,"sku":"ftw1787938073762","price":199.37,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0580\/3933\/7057\/files\/touptek-gs-papo-guide-scopes_1.webp?v=1787938078","url":"https:\/\/www.sunlitharbor.shop\/products\/touptek-gs-papo-guide-scopes","provider":"My Store","version":"1.0","type":"link"}